Measure with a protractor · 1 Here are some angles. a) Sort the 130angles into the table. Acute...
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1 Here are some angles. a) Sort the angles into the table. Acute angle Obtuse angle Right angle Reflex angle b) How did you decide where to place each angle? c) Estimate the size of each angle. Compare answers with a partner. 2 What is the size of each angle? Choose the correct answer. a) 90 80 100 70 110 60 120 50 130 40 140 30 150 20 160 10 170 0 180 180 0 170 10 160 20 150 30 140 40 130 50 120 60 110 70 100 80 40° 140° b) 90 80 100 70 110 60 120 50 130 40 140 30 150 20 160 10 170 0 180 180 0 170 10 160 20 150 30 140 40 130 50 120 60 110 70 100 80 61° 119° c) 90 80 100 70 110 60 120 50 130 40 140 30 150 20 160 10 170 0 180 180 0 170 10 160 20 150 30 140 40 130 50 120 60 110 70 100 80 37° 143° d) 90 80 100 70 110 60 120 50 130 40 140 30 150 20 160 10 170 0 180 180 0 170 10 160 20 150 30 140 40 130 50 120 60 110 70 100 80 21° 159° Look at the angles you have not chosen. Why might somebody think they are correct? 3 Measure the size of each angle using a protractor. a) b) c) Measure with a protractor © White Rose Maths 2020 A B C D E F
Transcript of Measure with a protractor · 1 Here are some angles. a) Sort the 130angles into the table. Acute...
1 Herearesomeangles.
a) Sorttheanglesintothetable.
Acuteangle Obtuseangle Rightangle Reflexangle
b) Howdidyoudecidewheretoplaceeachangle?
c) Estimatethesizeofeachangle.
Compareanswerswithapartner.
2 Whatisthesizeofeachangle?Choosethecorrectanswer.
a)
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b)
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c)
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d)
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21° 159°
Lookattheanglesyouhavenotchosen.
Whymightsomebodythinktheyarecorrect?
3 Measurethesizeofeachangleusingaprotractor.
a) b) c)
Measurewithaprotractor
©WhiteRoseMaths2020
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d) f) h)
e) g)
4 a) Workoutthesizesoftheangles.
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a
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b) Discusswithapartnerhowyouworkedouteachangle.
c) Findthetotalofyourthreeangles.
Whatdoyounotice?
5 Rosieismeasuringthesizeofthisangle.
a)
DoyouagreewithRosie?
Explainyouranswer.
b) Measurethesizeoftheangle.
Measurewithaprotractor
©WhiteRoseMaths2020
I can’t measure it because my protractor doesn’t go that far.
b)
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c)
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21° 159°
Lookattheanglesyouhavenotchosen.
Whymightsomebodythinktheyarecorrect?
3 Measurethesizeofeachangleusingaprotractor.
a) b) c)
